[jhbuild/wip/3-34-release-preparation] news: start to write news for the 3.33.92 release

[Sébastien Wilmet <swilmet src gnome org>]

commit 1c6facfaea044c1d7d15b16a2f67e91af4f037f2
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Aug 28 16:17:40 2019 +0200

    news: start to write news for the 3.33.92 release
    
    Contributions are welcome to improve the list of important changes.
    
    https://gitlab.gnome.org/GNOME/jhbuild/issues/25

 NEWS | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
---
diff --git a/NEWS b/NEWS
index 2f3a7c12..af93a15d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,21 @@
+=============
+Version X.Y.Z (not yet released)
+=============
+
+GNOME people: if you see this, you can improve the list of important changes
+if you see something missing. This message will be removed for the actual
+release. See: https://gitlab.gnome.org/GNOME/jhbuild/issues/25
+
+Important changes:
+- The GNOME release team no longer uses JHBuild, it has been superseded by
+  BuildStream for that purpose.
+- Remove the modulesets for past GNOME versions, keep only the latest.
+- Support for the Meson build system.
+- Various improvements to the jhbuild tool.
+- Lots of updates to the modulesets.
+- Bug fixes.
+- Translation updates.
+
 ===============
 Version 3.15.92
 ===============